JP2023031807A - optical unit - Google Patents

Abstract

To provide an optical unit capable of suppressing a decrease in mount precision of an optical element to a holder even if a mold for molding a holder is subjected to a welding loss or the like.SOLUTION: An optical unit has an optical element 10 and a holder 20. The optical element 10 reflects light advancing in a first direction X in a second direction Y that intersects the first direction X. The holder 20 holds the optical element 10. The holder 20 has a holder body 21 extending in a third direction Z and a side face part 22 extending in a direction intersecting the third direction Z from the holder body 21. The holder body 21 has a placement surface 21a for placing the optical element 10. The side face part 22 has an inner side face 221 facing the optical element 10. The inner side face 221 is connected to an edge in the third direction Z of the placement surface 21a. The holder body 21 has a groove part 211 in an edge of the placement surface 21a, or the optical element 10 has a placed surface 13 that is placed on the placement surface 21a, a side face 14 facing the inner side face 221, and a chamfering part.SELECTED DRAWING: Figure 6

Description

The present invention relates to optical units.

Image blurring may occur due to camera shake when taking still images or moving images with a camera. Camera shake correction devices have been put to practical use to suppress image blurring and enable clear shooting. A camera shake correction device suppresses image blur by correcting the orientation of a camera module according to camera shake when the camera shakes. Further, the camera shake correction device has an optical unit. The optical unit has an optical element that changes the traveling direction of light and a holder that holds the optical element (see Patent Document 1, for example).

Patent Literature 1 describes a prism device having a prism and a square stand that holds the prism. The corner stand has a support surface for supporting the prism and side walls arranged at opposite ends of the support surface. The sidewalls are perpendicular to the support surface.

Chinese Utility Model Registration No. 206002752

By the way, in the prism device as disclosed in Patent Document 1, the square stand is usually formed by injection-molding a resin using a mold. That is, the support surface and sidewalls are a single member.

However, when injection molding is repeated, the corners of the mold gradually become rounded due to chipping. For this reason, an unnecessary portion having a shape corresponding to the missing portion is formed at the connecting portion between the supporting surface of the square stand and the side wall. In other words, an unnecessary portion projecting from the supporting surface and the side wall toward the prism is formed at the connecting portion between the supporting surface and the side wall. As a result, the prism comes into contact with the unnecessary part, so that the mounting accuracy of the prism to the square stand is lowered.

In this specification, chipping typically means erosion, but also includes wear or chipping due to physical contact. Further, erosion means that the mold is mechanically or chemically eroded by the contact of high-temperature molten metal with the mold. Hereinafter, in this specification, defects are referred to as erosion or the like.

The present invention has been made in view of the above problems, and an object of the present invention is to suppress deterioration in mounting accuracy of an optical element with respect to a holder even when a mold for molding the holder is damaged by melting or the like. To provide an optical unit.

An exemplary optical unit of the present invention has an optical element and a holder. The optical element reflects light traveling in one side in a first direction to one side in a second direction crossing the first direction. The holder holds the optical element. The holder has a holder main body extending in a third direction intersecting the first direction and the second direction, and a side portion extending from the holder main body in a crossing direction intersecting the third direction. The holder main body has a mounting surface on which the optical element is mounted. The lateral portion has an inner surface facing the optical element. The inner surface is connected to the end of the mounting surface in the third direction. The holder main body has a groove disposed at the end of the mounting surface, or the optical element faces the mounting surface mounted on the mounting surface and the inner side surface. It has a side surface and a chamfered portion arranged at a connecting portion between the mounting surface and the side surface.

According to the exemplary embodiment of the present invention, it is possible to provide an optical unit capable of suppressing deterioration in mounting accuracy of an optical element with respect to a holder even when a mold for molding the holder is damaged by melting or the like.

FIG. 1 is a perspective view schematically showing a smart phone provided with an optical unit according to an embodiment of the invention. FIG. 2 is a perspective view showing the optical unit according to this embodiment. FIG. 3 is an exploded perspective view in which the optical unit according to this embodiment is disassembled into a movable body and a support. FIG. 4 is an exploded perspective view of the movable body of the optical unit according to this embodiment. 5A is a cross-sectional view taken along line VA--VA of FIG. 2. FIG. 5B is a cross-sectional view taken along line VB-VB in FIG. 2. FIG. FIG. 5C is a cross-sectional view along line VC-VC of FIG. FIG. 5D is a cross-sectional view along line VD-VD in FIG. FIG. 6 is an exploded perspective view of the optical elements and the holder of the optical unit according to this embodiment. FIG. 7 is a diagram showing the structure of the optical elements and holders of the optical unit according to this embodiment from the fourth direction. FIG. 8 is a view showing the structure of the holder of the optical unit according to this embodiment from the first direction. 9 is a cross-sectional view taken along line IX-IX in FIG. 6. FIG. FIG. 10 is an enlarged perspective view of the side portion of the holder of the optical unit according to this embodiment. FIG. 11 is an exploded perspective view showing the optical elements, the holder, and the first preload portion of the optical unit according to this embodiment. FIG. 12 is an exploded perspective view showing optical elements, a holder, a first preload portion, a first support portion and a second magnet of the optical unit according to this embodiment. FIG. 13 is a perspective view showing the movable body of the optical unit according to this embodiment. FIG. 14 is a view showing the first supporting portion of the optical unit according to this embodiment from one side X1 in the first direction X. FIG. FIG. 15 is an exploded perspective view of the support of the optical unit according to this embodiment. FIG. 16 is a perspective view showing the periphery of the second support portion of the optical unit according to this embodiment. 17 is a view showing the second support portion of the optical unit according to this embodiment from the other side X2 in the first direction X. FIG. 18 is a view showing the second supporting portion, the first convex portion, the second convex portion, and the second magnet of the optical unit according to this embodiment from the other side X2 in the first direction X. FIG. FIG. 19 is a view showing the structure of the holder of the optical unit according to the first modified example of this embodiment from the fourth direction. FIG. 20 is a view showing the structure of the holder of the optical unit according to the second modified example of this embodiment from the fourth direction. FIG. 21 is a view showing the structure of the holder of the optical unit according to the third modified example of this embodiment from the fourth direction. FIG. 22 is a diagram showing the structure of an optical element and a holder of an optical unit according to a fourth modified example of this embodiment, viewed from a fourth direction. FIG. 23 is a perspective view showing the structure of an optical element of an optical unit according to a fourth modified example of this embodiment. FIG. 24 is a diagram showing the structure of optical elements and holders of an optical unit according to a fifth modified example of the present embodiment, viewed from the fourth direction. FIG. 25 is a diagram showing the structure of the optical elements and holders of the optical unit according to the sixth modification of the present embodiment, viewed from the fourth direction.

Exemplary embodiments of the invention are described below with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

In this specification, for ease of understanding, the first direction X, the second direction Y, and the third direction Z that intersect with each other are appropriately described. Also, in this specification, the first direction X, the second direction Y, and the third direction Z are orthogonal to each other, but they do not have to be orthogonal. Also, one side in the first direction is described as one side X1 in the first direction X, and the other side in the first direction is described as the other side X2 in the first direction X. Also, one side in the second direction is described as one side Y1 in the second direction Y, and the other side in the second direction is described as the other side Y2 in the second direction Y. One side of the third direction is described as one side Z1 of the third direction Z, and the other side of the third direction is described as the other side Z2 of the third direction Z. Also, for convenience, the first direction X may be described as the vertical direction. One side X1 in the first direction X indicates the downward direction, and the other side X2 in the first direction X indicates the upward direction. However, the vertical direction, the upward direction, and the downward direction are defined for convenience of explanation, and do not need to coincide with the vertical direction. Further, the vertical direction is defined only for the convenience of explanation, and the orientation during use and assembly of the optical unit according to the present invention is not limited.

First, an example of the application of the optical unit 1 will be described with reference to FIG. FIG. 1 is a perspective view schematically showing a smart phone 200 including an optical unit 1 according to an embodiment of the invention. A smartphone 200 has an optical unit 1 . The optical unit 1 reflects incident light in a specific direction. As shown in FIG. 1, the optical unit 1 is preferably used as an optical component of a smart phone 200, for example. Note that the application of the optical unit 1 is not limited to the smart phone 200, and can be used in various devices such as a digital camera and a video camera.

The smart phone 200 has a lens 202 into which light is incident. In the smartphone 200 , the optical unit 1 is arranged inside the lens 202 . When the light L enters the smart phone 200 through the lens 202 , the traveling direction of the light L is changed by the optical unit 1 . Then, the light L is imaged by an imaging device (not shown) through a lens unit (not shown).

Next, the optical unit 1 will be described with reference to FIGS. 2 to 18. FIG. FIG. 2 is a perspective view showing the optical unit 1 according to this embodiment. FIG. 3 is an exploded perspective view in which the optical unit 1 according to this embodiment is disassembled into a movable body 2 and a support 3. As shown in FIG. As shown in FIGS. 2 and 3, the optical unit 1 has at least an optical element 10 and a holder 20 . In this embodiment, the optical unit 1 further has a second adhesive member 55 (FIG. 5C). A detailed description will be given below.

FIG. 4 is an exploded perspective view of the movable body 2 of the optical unit 1 according to this embodiment. As shown in FIGS. 2 to 4, optical unit 1 has movable body 2 and support body 3 . The support 3 supports the movable body 2 so as to be swingable about the second swing axis A2.

The movable body 2 has an optical element 10 . Also, the movable body 2 has a holder 20 and a first support portion 30 . The movable body 2 also has a first preload portion 40 . The optical element 10 changes the traveling direction of light. Holder 20 holds optical element 10 . The first support portion 30 supports the holder 20 and the optical element 10 so as to be swingable around a first swing axis A1 that intersects with the second swing axis A2. Further, the first support portion 30 is supported by the support body 3 so as to be swingable about the second swing axis A2. More specifically, the first support portion 30 is supported by the second support portion 60 of the support 3 so as to be swingable about the second swing axis A2.

That is, the holder 20 can swing with respect to the first support portion 30 , and the first support portion 30 can swing with respect to the second support portion 60 . Therefore, since the optical element 10 can be swung about the first swing axis A1 and the second swing axis A2, the optical element 10 can swing about the first swing axis A1 and the second swing axis A2. posture can be corrected. Therefore, image blurring can be suppressed in two directions. As a result, correction accuracy can be improved as compared with the case where the optical element 10 is oscillated about only one oscillating axis. Note that the first swing axis A1 is also called a pitching axis. The second swing axis A2 is also called a roll axis.

In this embodiment, the first support section 30 supports the holder 20 and the optical element 10 as described above. Also, the first support portion 30 is supported by the second support portion 60 . That is, the holder 20 and the optical element 10 are indirectly supported by the second support portion 60 of the support 3 via the first support portion 30 . Note that the holder 20 and the optical element 10 may be directly supported by the second support portion 60 of the support 3 without the first support portion 30 interposed therebetween. That is, the movable body 2 does not have to have the first support portion 30 .

The first swing axis A1 is an axis extending along a third direction Z intersecting the first direction X and the second direction Y. As shown in FIG. Also, the second swing axis A2 is an axis extending along the first direction X. As shown in FIG. Therefore, the optical element 10 can be swung around the first swing axis A1 intersecting the first direction X and the second direction Y. As shown in FIG. Also, the optical element 10 can be swung around the second swing axis A2 extending along the first direction X. As shown in FIG. Therefore, the posture of the optical element 10 can be appropriately corrected. Also, the first direction X and the second direction Y are directions along the traveling direction of the light L (FIG. 5A). That is, the optical element 10 can be oscillated around the first oscillation axis A1 intersecting the first direction X and the second direction Y, which are directions in which the light L travels. Therefore, the posture of the optical element 10 can be corrected more appropriately.

Also, the first support portion 30 supports the holder 20 in the third direction Z. As shown in FIG. Therefore, the first support portion 30 can be easily swung about the first swing axis A1 extending along the third direction Z. As shown in FIG. Specifically, in this embodiment, the first support portion 30 supports the holder 20 in the third direction Z via the first preload portion 40 .

5A is a cross-sectional view taken along line VA--VA of FIG. 2. FIG. 5B is a cross-sectional view taken along line VB-VB in FIG. 2. FIG. FIG. 5C is a cross-sectional view along line VC-VC of FIG. FIG. 5D is a cross-sectional view along line VD-VD in FIG. FIG. 6 is an exploded perspective view of the optical element 10 and the holder 20 of the optical unit 1 according to this embodiment. As shown in FIGS. 5A-5D and 6, the optical element 10 consists of a prism. A prism is formed from a transparent material that has a higher refractive index than air. Note that the optical element 10 may be, for example, a plate-like mirror. In this embodiment, the optical element 10 has a substantially triangular prism shape. Specifically, the optical element 10 has a light entrance surface 11 , a light exit surface 12 , a reflecting surface 13 and a pair of side surfaces 14 . Light L is incident on the light incident surface 11 . The light exit surface 12 connects to the light entrance surface 11 . The light exit surface 12 is arranged perpendicular to the light entrance surface 11 . The reflective surface 13 is connected to the light incident surface 11 and the light exit surface 12 . The reflective surface 13 is inclined about 45 degrees with respect to each of the light incident surface 11 and the light exit surface 12 . The reflecting surface 13 reflects the light L traveling in one side X1 in the first direction X toward one side Y1 in a second direction Y intersecting the first direction X. As shown in FIG. That is, the optical element 10 reflects light L traveling in one side X1 in the first direction X to one side Y1 in the second direction Y intersecting the first direction X. As shown in FIG. A pair of side surfaces 14 are connected to the light incident surface 11 , the light exit surface 12 and the reflecting surface 13 . The pair of side surfaces 14 are arranged substantially perpendicular to the third direction Z. As shown in FIG. In addition, the reflecting surface 13 is an example of the "mounting surface" of the present invention.

Also, the optical axis L10 of the optical element 10 and the second swing axis A2 are arranged to overlap each other. In this specification, the optical axis L10 of the optical element 10 is an axis perpendicular to the light incident surface 11 of the optical element 10 and passing through the center of the reflecting surface 13, or the light of the lens 202 on which the light is incident. An axis, or an axis extending in a direction perpendicular to the optical axis of the lens unit passing through the intersection of the reflecting surface 13 and the optical axis of the lens unit at the reflection destination, or a straight line passing through the center of the imaging device and the reflecting surface 13 , and coincides with at least one of the axes extending in a direction perpendicular to a straight line passing through the center of the imaging device. Typically, the axis perpendicular to the light incident surface 11 of the optical element 10 and passing through the center of the reflecting surface 13, the optical axis of the lens 202 on which the light is incident, and the optical axis of the lens unit at the reflection destination. and the reflecting surface 13 and extending in a direction perpendicular to the optical axis of the lens unit, and a straight line passing through the center of the imaging element All coincide with the axis extending in the direction perpendicular to the .

The holder 20 is made of resin, for example. The holder 20 has a holder main body 21 and side portions 22 . In this embodiment, the holder 20 has a holder main body 21 and a pair of side portions 22 . The holder body 21 extends in a third direction Z that intersects with the first direction X and the second direction Y. As shown in FIG. The holder body 21 has a support surface 21a. In addition, the support surface 21a is an example of the "mounting surface" of this invention. The optical element 10 is mounted on the supporting surface 21a. Support surface 21 a supports optical element 10 . The support surface 21 a is a surface that faces the reflecting surface 13 of the optical element 10 and is connected to the pair of side surface portions 22 . The support surface 21a is an inclined surface that is inclined at about 45 degrees with respect to the incident direction of the light L, and contacts the reflecting surface 13 of the optical element 10 over substantially the entire area of the inclined surface. That is, the reflecting surface 13 is placed on the supporting surface 21a. The incident direction of the light L is the direction toward the one side X1 of the first direction X. As shown in FIG.

Moreover, the holder main body 21 has a rear surface 21b and a lower surface 21c. The rear surface 21b is connected to the end of the support surface 21a on the side opposite to the direction in which the light L is emitted. It should be noted that the “direction of emission of the light L” is the one side Y1 of the second direction Y. As shown in FIG. In addition, “the end portion on the side opposite to the emission direction of the light L” is the end portion on the other side Y2 in the second direction Y. As shown in FIG. The lower surface 21c connects to the support surface 21a and the back surface 21b.

The side surface portion 22 extends from the holder main body 21 in a crossing direction crossing the third direction Z (hereinafter referred to as crossing direction). The cross directions include, for example, the first direction X and the second direction Y. The pair of side surface portions 22 are arranged at both ends in the third direction Z of the holder body 21 . The optical element 10 is arranged between the pair of side portions 22 . The pair of side portions 22 have shapes symmetrical to each other in the third direction Z. As shown in FIG. An inner side surface 221, which will be described later, of the side surface portion 22 is connected to an end portion in the third direction Z of the support surface 21a.

Here, the holder main body 21 has a groove portion 211 arranged at the end portion in the third direction Z of the support surface 21a. Alternatively, the optical element 10 has a chamfer arranged at the junction of the reflective surface 13 and the side surface 14 . In this embodiment, a case where the holder body 21 has a groove portion 211 arranged at the end portion of the support surface 21a in the third direction Z will be described. Note that an example in which the optical element 10 has a chamfered portion arranged at the connecting portion between the reflecting surface 13 and the side surface 14 will be described later as a modified example of this embodiment.

FIG. 7 is a diagram showing the structure of the optical element 10 and the holder 20 of the optical unit 1 according to this embodiment, viewed from the fourth direction α. FIG. 8 is a diagram showing the structure of the holder 20 of the optical unit 1 according to this embodiment from the first direction X. As shown in FIG. In FIG. 7, the unnecessary portion P21 and the second adhesive member 55 are hatched for easy understanding.

As shown in FIGS. 6 and 7, in this embodiment, as described above, the holder body 21 has the groove 211 arranged at the end of the support surface 21a in the third direction Z. As shown in FIGS. Therefore, the corners of a holder molding die (hereinafter sometimes referred to as a die) for molding the holder 20 are eroded, and the connection between the support surface 21a and the inner side surface 221 of the holder 20 is damaged. Even when an R-shaped unnecessary portion P21 (see FIG. 7) corresponding to the melted portion is formed, it is possible to suppress the unnecessary portion P21 from protruding from the groove portion 211 toward the optical element 10 side. Therefore, it is possible to prevent the unnecessary portion P21 from contacting the optical element 10, thereby preventing a decrease in mounting accuracy of the optical element 10 with respect to the holder 20. FIG. In this embodiment, the grooves 211 are arranged at both ends in the third direction Z of the support surface 21a.

Further, unlike the case where the optical element 10 has a chamfered portion arranged at the connecting portion of the reflecting surface 13 and the side surface 14, the holder body 21 has a groove portion 211 arranged at the end of the support surface 21a in the third direction Z. By having it, the reflective surface 13 of the optical element 10 is not narrowed. In other words, when the chamfered portion is formed in the optical element 10, the optical element 10 needs to be enlarged by the amount of the chamfered portion. Further, since the grooves 211 are also formed when the holder 20 is manufactured by injection molding, there is no need to perform additional processing (such as cutting) for forming the grooves 211 on the holder 20 . In addition, when forming a chamfered portion in the optical element 10, it is necessary to additionally perform a chamfering process on the optical element 10 on the market.

Further, in this embodiment, the depth H211 of the groove portion 211 is the deepest at the position closest to the inner side surface 221 . Therefore, the position of the groove 211 corresponding to the portion of the mold that is most likely to be eroded can be made the deepest. Therefore, even if the corner of the mold is melted, it is possible to easily prevent the unnecessary portion P21 from protruding toward the optical element 10 from the support surface 21a.

In this embodiment, the depth H211 of the groove 211 is substantially constant. Specifically, the groove portion 211 has a bottom surface 211a. The bottom surface 211a is substantially parallel to the support surface 21a.

In addition, the support surface 21a is connected to the inner surface 221 along a fourth direction α (see FIG. 6) that intersects the third direction Z. As shown in FIG. The groove portion 211 extends from one end 21e of the support surface 21a in the fourth direction α to the other end 21f. Therefore, even if the reflecting surface 13 of the optical element 10 is larger than the supporting surface 21a in the fourth direction α, it is possible to easily prevent the optical element 10 from contacting the unnecessary portion P21. In addition, the fourth direction α is a direction along the inclination direction of the support surface 21a.

In addition, as shown in FIG. 8, when viewed from the first direction X, the end portion 211b of the groove portion 211 on the one side Y1 in the second direction Y corresponds to the end portion of the support surface 21a on the one side Y1 in the second direction Y ( It is located on the other side Y2 in the second direction Y compared to the one end 21e). Therefore, the end of the groove 211 on one side X1 in the first direction X (end 211b) and the end of the support surface 21a on one side X1 in the first direction X (one end 21e) are arranged in the first direction X You can easily put them in the same position. That is, it is possible to easily prevent the end portion 211b of the groove portion 211 from protruding from the lower surface 21c of the holder main body 21 toward the one side X1 in the first direction X. Therefore, since the lower mold of the mold for molding the holder can be flattened, there is no need to perform complicated processing on the lower mold. Alternatively, it is not necessary to secure a thickness for forming the groove portion 211 on the one side X1 in the first direction X from the end (one end 21e) of the support surface 21a of the holder 20 . In other words, it is not necessary to increase the thickness of the holder 20 in the first direction X.

Further, the holder main body 21 has a recess 21d arranged on the support surface 21a. In this embodiment, the holder body 21 has three recesses 21d.

Here, the recess 21d is arranged between the grooves 211 in the third direction Z. As shown in FIG. Alternatively, the concave portion 21d is arranged in the third direction Z between chamfered portions, which will be described later. In the present embodiment, the recess 21d is arranged between the grooves 211 in the third direction Z. As shown in FIG. An example in which the recessed portion 21d is arranged between the chamfered portions in the third direction Z will be described later as a modified example of the present embodiment.

As described above, the recess 21d is arranged between the grooves 211 in the third direction Z in the present embodiment. Therefore, since the area of the support surface 21a excluding the recess 21d is narrowed, it is possible to suppress the deterioration of the flatness of the support surface 21a excluding the recess 21d. Therefore, it is possible to suppress variation in the mounting angle of the optical element 10 with respect to the support surface 21a. Further, the recess 21d is arranged at a predetermined distance from one end 21e and the other end 21f of the support surface 21a in the fourth direction α.

9 is a cross-sectional view taken along line IX-IX in FIG. 6. FIG. As shown in FIGS. 6 and 9 , the side portion 22 has an inner side surface 221 , an end surface 222 and a recess 225 . In this embodiment, both of the pair of side portions 22 have inner side surfaces 221 , end surfaces 222 and recesses 225 .

The inner side 221 faces the optical element 10 . Specifically, the inner surface 221 extends substantially parallel to the side surface 14 of the optical element 10 . Side 14 of optical element 10 faces inner side 221 . A gap between the inner side surface 221 and the side surface 14 of the optical element 10 is, for example, several millimeters or less. In this embodiment, the gap between the inner surface 221 and the side surface 14 of the optical element 10 is, for example, 1 mm or less.

The end face 222 connects to the transverse edge of the inner face 221 . Also, the end surface 222 extends in the third direction Z. As shown in FIG. In this embodiment, the end surface 222 includes a first end surface 222a and a second end surface 222b. The first end surface 222a connects to the edge of the inner surface 221 in the first direction X. As shown in FIG. The second end surface 222b connects to the edge of the inner surface 221 in the second direction Y. As shown in FIG. More specifically, the first end face 222a connects to the edge of the inner side face 221 on the other side X2 in the first direction X. As shown in FIG. The second end surface 222b connects to the edge of the inner surface 221 on the one side Y1 in the second direction Y. As shown in FIG. In other words, the side surface portion 22 includes a first end face 222a that is the end face 222 arranged on the other side X2 in the first direction X and a second end face 222b that is the end face 222 arranged on the one side Y1 in the second direction Y. and Also, the first end surface 222a extends in the second Y direction and the third Z direction. The second end surface 222b extends in the first direction X and the third direction Z. As shown in FIG.

The recess 225 is arranged across the inner surface 221 and the end surface 222 . The recess 225 is recessed in the cross direction from the end surface 222 . The recess 225 has an inner surface 225c and a bottom surface 225d. The inner surface 225 c extends in a direction crossing the end surface 222 . Also, the inner surface 225c extends in the cross direction from the end surface 222 . Bottom surface 225d intersects inner surface 225c. In this embodiment, the recess 225 has a first recess 225a and a second recess 225b. The first concave portion 225a is arranged across the inner side surface 221 and the first end surface 222a. The first concave portion 225a is recessed along the first direction X from the first end surface 222a. The second recess 225b is arranged across the inner side surface 221 and the second end surface 222b. The second recess 225b is recessed along the second direction Y from the second end surface 222b.

The recess 225 accommodates the first bonding member 50 (see FIG. 2) that bonds the optical element 10 and the holder 20 together. The first adhesive member 50 contacts the side surface 14 of the optical element 10 while being accommodated in the recess 225 of the holder 20 .

FIG. 10 is an enlarged perspective view of the side surface portion 22 of the holder 20 of the optical unit 1 according to this embodiment. As shown in FIGS. 9 and 10, the length of the recess 225 in the direction along the end surface 222 is greater than the depth of the recess 225 in the transverse direction. Specifically, the length Ly 225a in the second direction Y of the first recess 225a is greater than the depth Lx 225a in the first direction X of the first recess 225a. In this embodiment, the length Ly 225a is at least twice the depth Lx 225a. The length Lz225a in the third direction Z of the first recess 225a is substantially the same as the depth Lx225a in the first direction X of the first recess 225a.

Also, the length Lx 225b in the first direction X of the second recess 225b is greater than the depth Ly 225b in the second direction Y of the second recess 225b. In this embodiment, the length Lx 225b is at least twice the depth Ly 225b. The length Lz225b in the third direction Z of the second recess 225b is substantially the same as the depth Ly225b in the second direction Y of the second recess 225b.

In the optical unit 1 of this embodiment, as described above, the length of the recess 225 in the direction along the end surface 222 is greater than the depth of the recess 225 in the cross direction. Therefore, since the opening in the end surface 222 can be secured, the first adhesive member 50 can be easily injected. As a result, for example, when injecting the first adhesive member 50 into the recess 225, a needle (not shown) for injecting the first adhesive member 50 can be prevented from coming into contact with the opening. Specifically, the contact of the needle with the edge of the recess 225 and the edge of the optical element 10 can be suppressed. Also, for example, larger diameter needles can be used. As a result, the time for injecting the first adhesive member 50 can be shortened.

Also, as described above, both of the pair of side portions 22 have recesses 225 . Therefore, since the optical element 10 can be fixed to the pair of side portions 22, the adhesive force can be improved.

Further, as described above, the recessed portion 225 of the side portion 22 has the first recessed portion 225a and the second recessed portion 225b. Therefore, since the optical element 10 can be fixed using the first concave portion 225a and the second concave portion 225b, the adhesive strength can be further improved.

Next, the side portion 22 will be described with reference to FIGS. 9 and 10. FIG. The first concave portion 225a is arranged on the other side Y2 in the second direction Y of the first end surface 222a. The second recess 225b is arranged on one side X1 in the first direction X of the second end face 222b. Therefore, the optical element 10 can be fixed to the holder 20 at two locations far from each other. As a result, the optical element 10 can be stably fixed to the holder 20 .

The first adhesive member 50 is, for example, an ultraviolet curable adhesive. Therefore, when curing the first adhesive member 50 in the concave portion 225, it is necessary to irradiate the first adhesive member 50 with ultraviolet rays. In this embodiment, as described above, the length of the recess 225 in the direction along the end surface 222 is greater than the depth of the recess 225 in the cross direction. Therefore, it is easy to irradiate the first adhesive member 50 with ultraviolet rays. In addition, since the depth of the concave portion 225 can be reduced, the ultraviolet rays can easily reach the bottom surface 225d of the concave portion 225. FIG. Note that the first adhesive member 50 is not particularly limited, and may be, for example, a thermosetting adhesive.

In addition, the inner surface 225c of the concave portion 225 has a curved surface when viewed from the optical axis direction of the optical element 10 . Therefore, for example, when molding the holder 20 by injection molding, it is possible to easily remove the mold component from the concave portion 225 . That is, the holder 20 can be easily molded. Further, for example, when irradiating the first adhesive member 50 in the recess 225 with ultraviolet rays, if the inner surface 225c of the recess 225 is formed only of flat surfaces, the light does not reach the corners where the flat surfaces intersect. Hateful. However, in the present embodiment, the inner surface 225c of the concave portion 225 has a curved surface that is curved when viewed from the optical axis direction of the optical element 10, so that it is possible to suppress the occurrence of a portion where it is difficult for light to reach.

Specifically, the inner surface 225c of the recess 225 has a plurality of flat surfaces 225e and curved surfaces 225f. In this embodiment, the inner surface 225c has three flat surfaces 225e and two curved surfaces 225f. The flat surfaces 225e are connected by a curved surface 225f. That is, the planes 225e are not directly connected to each other.

A bottom surface 225 d of the recess 225 extends along the end surface 222 . Therefore, it is possible to prevent the depth from the surface of the first adhesive member 50 to the bottom surface 225d from becoming uneven. As a result, the first adhesive member 50 can be easily and uniformly cured. In this embodiment, the depth of the bottom surface 225d is substantially constant. The bottom surface 225 d is substantially parallel to the end surface 222 . Specifically, the bottom surface 225d of the first recess 225a is substantially parallel to the first end surface 222a. A bottom surface 225d of the second recess 225b is substantially parallel to the second end surface 222b.

A second adhesive member 55 (see FIG. 5B) is arranged between the inner surface 221 and the optical element 10 . Therefore, the optical element 10 and the holder 20 can be firmly fixed by the second adhesive member 55 . The second adhesive member 55 is an example of the "adhesive member" in the present invention. The second adhesive member 55 is, for example, a thermosetting adhesive. In addition, by using both an ultraviolet curable adhesive (first adhesive member 50) and a heat curable adhesive (second adhesive member 55), for example, only the ultraviolet curable adhesive is cured to form the optical element 10. It becomes possible to handle the optical element 10 and the holder 20 in a state temporarily fixed to the holder 20 . The second adhesive member 55 is not particularly limited, and may be, for example, an ultraviolet curable adhesive.

As described above, the second adhesive member 55 is arranged between the side portion 22 of the holder 20 and the optical element 10 . The second bonding member 55 bonds the holder 20 and the optical element 10 together. Therefore, the optical element 10 can be easily fixed to the holder 20 .

Next, the structure of the side portion 22 will be explained. As shown in FIGS. 5A to 5D and 6 , at least one of the holder 20 and the first support portion 30 is recessed on the side opposite to the first preload portion 40 or directed toward the first preload portion 40 . It has protruding protrusions. In this embodiment, the holder 20 has an axial concave portion 22b that is concave on the side opposite to the first preload portion 40. As shown in FIG.

Specifically, the holder 20 has a pair of opposed side surfaces 22a and an axial recess 22b. The pair of opposing side surfaces 22 a are arranged on each of the pair of side surface portions 22 . The pair of opposing side surfaces 22a are opposed to the pair of first preload portions 40, respectively. A detailed structure of the first preload portion 40 will be described later. The axial recess 22b is arranged on the opposing side surface 22a. The axial recess 22b is recessed toward the inside of the holder 20 on the first swing axis A1. The axial concave portion 22 b accommodates at least a portion of the axial convex portion 45 of the first preload portion 40 . The axial recess 22b has at least a portion of a concave spherical surface.

Also, one of the holder 20 and the first support portion 30 has a limiting concave portion 22c. The restricting recessed portion 22c restricts movement of the projecting portion 46 of the first preload portion 40 in a direction intersecting the first swing axis A1.

In this embodiment, the holder 20 has a limiting recess 22c. Specifically, the limiting recess 22c is arranged on the opposing side surface 22a. The restriction recess 22c restricts the movement of the first preload portion 40 along the side surface portion 22 beyond a predetermined distance. More specifically, the limiting concave portion 22c is recessed toward the inside of the holder 20 in the third direction Z. As shown in FIG. The limiting recess 22c has an inner surface 22d. For example, the limiting recess 22c may be a recess with both sides in the first direction X and both sides in the second direction Y closed. Further, for example, the restriction recess 22c may be a recess with one side in the first direction X open, or may be a recess with one side in the second direction Y open.

The projecting portion 46 of the first preload portion 40 is arranged inside the limiting recess portion 22c. The projecting portion 46 of the first preload portion 40 is separated from the inner surface 22d of the limiting recessed portion 22c at a predetermined distance in a state where the axially projecting portion 45 is fitted in the axially recessed portion 22b. On the other hand, when an impact or the like is applied to the optical unit 1 and the holder 20 is about to move, for example, in the first direction X and the second direction Y by a predetermined distance or more, the protruding portion 46 of the first preload portion 40 is pushed into the restricting concave portion 22c. It contacts the inner surface 22d. Therefore, it is possible to prevent the holder 20 from coming off the first preload portion 40 . For example, four restricting concave portions 22c are provided in this embodiment. The number of restricting concave portions 22c may be one, but preferably plural.

The optical unit 1 has a first preload section 40 . The first preload portion 40 connects the holder 20 and the first support portion 30 . The first preload portion 40 is elastically deformable. Also, the first preload portion 40 is arranged on at least one of the holder 20 and the first support portion 30 . The first preload portion 40 applies preload to at least the other of the holder 20 and the first support portion 30 in the axial direction of the first swing axis A1. Therefore, it is possible to prevent the holder 20 from being displaced from the first support portion 30 in the axial direction of the first swing axis A1. Further, even if there is a manufacturing error in the dimensions of each member, it is possible to suppress the occurrence of looseness or the like in the axial direction of the first swing axis A1. In other words, for example, displacement of the holder 20 in the axial direction of the first swing axis A1 can be suppressed. The axial direction of the first swing axis A1 is the direction along the third direction Z. As shown in FIG. In addition, in this specification, "to apply a preload" means to apply a load in advance.

Next, the detailed structure of the first preload portion 40 will be described with reference to FIGS. 11 and 12. FIG. FIG. 11 is an exploded perspective view showing the optical element 10, the holder 20, and the first preload portion 40 of the optical unit 1 according to this embodiment. FIG. 12 is an exploded perspective view showing the optical element 10, the holder 20, the first preload portion 40, the first support portion 30, and the second magnet 121 of the optical unit 1 according to this embodiment. As shown in FIGS. 11 and 12 , the first preload portion 40 is arranged between the holder 20 and the first support portion 30 . The first preload portion 40 applies preload to the holder 20 in the axial direction of the first swing axis A1.

Specifically, in this embodiment, each first preload portion 40 is a single member. The first preload portion 40 is formed by bending one plate member. The first preload portion 40 is a leaf spring in this embodiment. The first preload portion 40 is arranged on the first support portion 30 .

The first preload portion 40 includes a first surface portion 41 located on the holder 20 side, a second surface portion 42 located on the first support portion 30 side, and a curved portion 43 connecting the first surface portion 41 and the second surface portion 42 . have Therefore, the first preload portion 40 can be easily deformed in the axial direction of the first swing axis A1. As a result, elastic force is generated by bending of the curved portion 43, so that preload can be easily applied to the holder 20 in the axial direction with a simple configuration.

Specifically, the first surface portion 41 faces the holder 20 in the axial direction of the first swing axis A1. The first surface portion 41 faces the side surface portion 22 of the holder 20 . The first surface portion 41 extends along the first direction X and the second direction Y. As shown in FIG. The first surface portion 41 is arranged along the side surface portion 22 . The second surface portion 42 faces the first support portion 30 in the axial direction of the first swing axis A1. The second surface portion 42 faces the side surface portion 32 of the first support portion 30 . The second surface portion 42 extends along the first direction X and the second direction Y. As shown in FIG. The second surface portion 42 is arranged along the side surface portion 32 .

The bending portion 43 is elastically deformable. Therefore, the first surface portion 41 and the second surface portion 42 can move toward or away from each other. In the present embodiment, the first preload portion 40 is arranged between the holder 20 and the first support portion 30, and the first preload portion 40 is moved such that the first surface portion 41 and the second surface portion 42 approach each other. is compressed and deformed in the axial direction of the first swing axis A1. Therefore, the first preload portion 40 applies preload to the holder 20 with a reaction force corresponding to the amount of deformation.

The first preload portion 40 has a convex portion that protrudes toward at least one of the holder 20 and the first support portion 30 , or a concave portion that is recessed on the side opposite to at least one of the holder 20 and the first support portion 30 . The convex portion or concave portion of the first preload portion 40 contacts the concave portion or convex portion of at least one of the holder 20 and the first support portion 30 . In this embodiment, the first preload portion 40 has an axial protrusion 45 . The axial protrusion 45 protrudes toward the holder 20 . The axial convex portion 45 of the first preload portion 40 contacts the axial concave portion 22 b of the holder 20 .

Further, in the present embodiment, the axial convex portion 45 is arranged on the first surface portion 41 . The axial protrusion 45 protrudes toward the holder 20 on the first swing axis A1. The axial protrusion 45 has at least a portion of a spherical surface. A portion of the axial protrusion 45 is accommodated in the axial recess 22b. Therefore, since the axial convex portion 45 and the axial concave portion 22b are in point contact, the holder 20 can be stably supported by the first preload portion 40. As shown in FIG.

Further, in the present embodiment, a pair of first preload portions 40 are provided. That is, the optical unit 1 has a pair of first preload portions 40 . The pair of first preload portions 40 are arranged on both sides of the holder 20 in the axial direction of the first swing axis A1. Therefore, the holder 20 can be supported more stably than when the first preload portion 40 is arranged only on one side of the holder 20 .

Specifically, the axial projections 45 of the pair of first preload portions 40 contact the pair of axial recesses 22b of the holder 20, respectively. The holder 20 is supported from both sides in the axial direction of the first swing axis A<b>1 by the first preloading portion 40 at two points of contact with the axial protrusion 45 . Therefore, the holder 20 can swing around the first swing axis A1 passing through the two contacts.

In addition, the first preload portion 40 further has a projecting portion 46 . The protruding portion 46 is arranged on one of the first surface portion 41 and the second surface portion 42 and protrudes toward one of the holder 20 and the first support portion 30 . In this embodiment, the projecting portion 46 is arranged on the first surface portion 41 in the same manner as the axially projecting portion 45 . The protrusion 46 protrudes toward the holder 20 in the direction along the first swing axis A1. The projecting portion 46 is provided corresponding to the limiting recessed portion 22c. For example, four projecting portions 46 are provided in each first preload portion 40 . A portion of the projecting portion 46 is accommodated in the limiting recess 22c. The projecting portion 46 is arranged so as to surround the axially projecting portion 45 . In other words, the axial protrusion 45 is arranged inside the region including the four protrusions 46 . The number of projections 46 may be, for example, one to three, or five or more. Moreover, the projecting portion 46 is formed by bending the end portion of the first surface portion 41 .

The first preload portion 40 has a mounting portion 47 . The attachment portion 47 is arranged, for example, on the second surface portion 42 . The mounting portion 47 is arranged at the upper end of the second surface portion 42 . The attachment portion 47 is attached to the upper end of the side portion 32 of the first support portion 30 . The attachment portion 47 is attached to the side portion 32 by sandwiching the upper end of the side portion 32 in the first direction X, for example. Note that the first preload portion 40 may not have the mounting portion 47, and may be fixed to the first support portion 30 using an adhesive or the like, for example. In this embodiment, the attachment portion 47 is fixed to the first support portion 30 using an adhesive.

FIG. 13 is a perspective view showing the movable body 2 of the optical unit 1 according to this embodiment. FIG. 14 is a view showing the first support portion 30 of the optical unit 1 according to this embodiment from one side X1 in the first direction X. FIG. FIG. 15 is an exploded perspective view of the support 3 of the optical unit 1 according to this embodiment. FIG. 16 is a perspective view showing the periphery of the second support portion 60 of the optical unit 1 according to this embodiment.

As shown in FIGS. 13 to 16 , one of the movable body 2 and the support 3 has a first projection 71 projecting toward the other of the movable body 2 and the support 3 . Specifically, one of the first support portion 30 and the second support portion 60 has a first convex portion 71 that protrudes toward the other of the first support portion 30 and the second support portion 60 . The other of the movable body 2 and the support body 3 contacts the first protrusion 71 . The first convex portion 71 is arranged on the second swing axis A2. Therefore, the movable body 2 swings around the first protrusion 71 . Therefore, the length from the contact position between the movable body 2 and the support body 3 to the swing center can be reduced. Since the force required to swing the movable body 2 is the product of the length from the contact position to the swing center and the frictional force, the first protrusion 71 should be arranged on the second swing axis A2. Therefore, the force required to swing the movable body 2 can be reduced. That is, the force required to drive the optical unit 1 can be reduced. Although the material of the first protrusion 71 is not particularly limited, the first protrusion 71 is formed of, for example, ceramic, resin, or metal.

Further, since the first protrusion 71 is arranged on the second swing axis A2, the contact position between the movable body 2 and the support 3 does not move with respect to the first protrusion 71 . Therefore, for example, when the movable body 2 swings, the other of the movable body 2 and the support body 3 slides on the first convex portion 71, and the other of the movable body 2 and the support body 3 and the first protrusion 71 slide. The frictional force with the 1 convex part 71 can be made small. In addition, since the optical axis L10 and the second swing axis A2 overlap each other, it is possible to prevent the optical axis L10 from deviating from the second swing axis A2 when the movable body 2 is swung.

Further, in the present embodiment, the support 3 has the first convex portion 71 . Therefore, it is possible to suppress the rotation of the first convex portion 71 when the movable body 2 swings. Therefore, the movable body 2 can be stably supported by the first protrusions 71 . As a result, the rocking motion of the movable body 2 is stabilized.

Also, one of the movable body 2 and the support body 3 has a plurality of second protrusions 72 projecting toward the other of the movable body 2 and the support body 3 . Specifically, one of the first support portion 30 and the second support portion 60 has a plurality of second protrusions 72 that protrude toward the other of the first support portion 30 and the second support portion 60 . The plurality of second protrusions 72 are arranged at positions separated from the second swing axis A2. The other of the movable body 2 and the support body 3 contacts the plurality of second protrusions 72 . The first protrusion 71 and the plurality of second protrusions 72 are arranged on the same plane that intersects with the second swing axis A2. Therefore, the movable body 2 can be supported by the first protrusion 71 and the plurality of second protrusions 72 arranged on the same plane. As a result, the movable body 2 can be stably supported. The same plane on which the first protrusion 71 and the plurality of second protrusions 72 are arranged includes, for example, a plane including the facing surface 61a or a plane including the lower facing surface 31e. Moreover, although the material of the second convex portion 72 is not particularly limited, the second convex portion 72 is formed of, for example, ceramic, resin, or metal.

Moreover, the position of the second convex portion 72 is constant. In other words, the second protrusion 72 does not move with respect to one of the movable body 2 and the support body 3 . In this embodiment, the second protrusion 72 does not move with respect to the support 3 . In other words, in this embodiment, even when the movable body 2 swings, the position of the second convex portion 72 with respect to the support body 3 is constant. Therefore, the movable body 2 can be supported more stably.

Moreover, in this embodiment, the number of the second protrusions 72 is two. Therefore, since the movable body 2 is supported by the three protrusions (the first protrusion 71 and the second protrusion 72), the movable body 2 is supported more easily than when the movable body 2 is supported by four or more protrusions. more stable and supportive. Moreover, in this embodiment, since the movable body 2 is in point contact with the movable body 2 at three points, the movable body 2 can be supported more stably.

The other of the movable body 2 and the support body 3 has a first concave portion 31f that is recessed in the opposite direction to the first convex portion 71 . The first concave portion 31 f contacts the first convex portion 71 . Therefore, by receiving the first convex portion 71 with the concave first concave portion 31f, it is possible to suppress the deviation of the center of the first convex portion 71 from the central axis of the first concave portion 31f. As a result, it is possible to suppress image blur caused by deviation of the rotation center. In addition, it is possible to prevent the swinging of the movable body 2 from becoming unstable due to the displacement of the center of rotation. As a result, for example, it is possible to suppress fluctuations in the current value required for the oscillation.

Further, in this embodiment, the movable body 2 has the first concave portion 31 f and the support body 3 has the first convex portion 71 . Therefore, when the first convex portion 71 is a sphere, the movable body 2 can be assembled to the support 3 while the sphere is placed on the second support 60, thereby facilitating assembly work.

Next, with reference to FIGS. 12 and 13, the structure around the first support portion 30 will be described in detail. As shown in FIGS. 12 and 13 , the first support portion 30 has a support body 31 and a pair of side portions 32 . The pair of side portions 32 are arranged on both sides of the holder 20 in the axial direction of the first swing axis A1. The support body 31 connects the pair of side portions 32 .

The support body 31 has an upper facing surface 31a. The upper facing surface 31 a faces the holder 20 in the first direction X. As shown in FIG. Note that the upper facing surface 31 a is separated from the bottom surface of the holder 20 .

The pair of side portions 32 are arranged at both ends in the third direction Z of the support body 31 . The pair of side portions 32 have shapes symmetrical to each other in the third direction Z. As shown in FIG. The side portion 32 has an inner side surface 32a. The inner side surface 32a faces the holder 20 in the third direction Z. As shown in FIG.

One of the first support portion 30 and the holder 20 has a mounting groove 32b. The mounting groove 32b is recessed on the side opposite to the other of the first support portion 30 and the holder 20 on the first swing axis A1. Therefore, the holder 20 and the first preload portion 40 can be easily attached to the first support portion 30 by moving the first preload portion 40 along the attachment groove 32b. In this embodiment, the first support portion 30 has a mounting groove 32b. The mounting groove 32b is recessed on the side opposite to the holder 20 on the first swing axis A1. The mounting groove 32b accommodates at least a portion of the first preload portion 40 and extends in a direction intersecting the first swing axis A1.

In this embodiment, the mounting groove 32b is arranged on the inner side surface 32a. The mounting groove 32b accommodates a portion of the first preload portion 40 . The mounting groove 32b extends in the first direction X. As shown in FIG.

Each side portion 32 has a pair of support portions 32c and a connecting portion 32d. The pair of pillars 32c are separated from each other in the second direction Y. As shown in FIG. The strut portion 32c extends in the first direction X. As shown in FIG. 32 d of connection parts connect the upper part of the support|pillar part 32c. The length in the third direction Z of the connection portion 32d is shorter than the length in the third direction Z of the support portion 32c. A mounting groove 32b is formed by a pair of the supporting column portion 32c and the connecting portion 32d.

Also, the first preload portion 40 is movable along the mounting groove 32b. In this embodiment, the first preload portion 40 is movable in the first direction X along the mounting groove 32b. By moving the first preload portion 40 along the attachment groove 32b, the attachment portion 47 of the first preload portion 40 sandwiches the connection portion 32d in the third direction Z. As shown in FIG.

In addition, the side portion 32 has an outer side surface 32e and a housing recessed portion 32f. The outer surface 32e faces outward in the third direction Z. As shown in FIG. The accommodation recess 32f is arranged on the outer side surface 32e. The accommodation recess 32 f accommodates at least a portion of the second magnet 121 of the second swing mechanism 120 . Moreover, the side surface portion 32 has a pair of notch portions 32g. The notch 32g is arranged at the end in the second direction Y of the housing recess 32f. A protrusion 122a of the magnet support plate 122 is arranged in the notch 32g. The magnet support plate 122 supports the second magnets 121 . The notch 32 g supports the magnet support plate 122 . Although the material of the magnet support plate 122 is not particularly limited, for example, a magnetic material may be used. In this case, the magnet support plate 122 is also called a back yoke. Magnetic leakage can be suppressed by using the magnet support plate 122 made of a magnetic material.

Also, the other of the movable body 2 and the support body 3 has a second concave portion 31g. In this embodiment, the movable body 2 has a second concave portion 31g. Specifically, the support body 31 has a lower facing surface 31e, a first recess 31f, and a second recess 31g. The lower facing surface 31 e faces the support 3 in the first direction X. As shown in FIG. The first recess 31f and the second recess 31g are arranged on the lower facing surface 31e.

The first recess 31f is arranged on the second swing axis A2. The first recess 31f has a portion of a concave spherical surface. Therefore, since the first convex portion 71 is received by the concave spherical surface, for example, the first convex portion 71 is less likely to shift laterally within the first concave portion 31f. As a result, the movable body 2 can be stably supported. On the other hand, for example, when the first concave portion 31f has a rectangular cross section, the first convex portion 71 tends to shift laterally with respect to the first concave portion 31f. Further, in the present embodiment, for example, unlike the case where the first protrusion 71 and the first recess 31f have a rectangular cross section, the first protrusion 71 and the first recess 31f can be easily brought into point contact.

The second concave portion 31g is recessed in the direction opposite to the second convex portion 72 . The second recess 31g is separated from the first recess 31f. That is, the second recess 31g is separated from the second swing axis A2. A plurality of second recesses 31g are provided. In this embodiment, two second recesses 31g are provided. The two second recesses 31g are arranged at positions equidistant to the second swing axis A2. The second concave portion 31g has a sliding surface 31h and an inner side surface 31i.

Also, the second concave portion 31 g contacts the second convex portion 72 . Specifically, the sliding surface 31 h of the second concave portion 31 g contacts the second convex portion 72 . The sliding surface 31h is arranged substantially parallel to the lower facing surface 31e. That is, the depth of the second concave portion 31g is substantially constant.

Further, as shown in FIG. 14, the outline of the second concave portion 31g is arranged outside the second convex portion 72 when viewed from the optical axis direction. Therefore, it is possible to prevent the second protrusion 72 from contacting the inner side surface 31i of the second recess 31g. As a result, friction between the second convex portion 72 and the second concave portion 31g can be suppressed. Specifically, the inner side surface 31i surrounds the sliding surface 31h. The inner side surface 31i is separated from the second protrusion 72 . That is, the contour of the second concave portion 31g is separated from the second convex portion 72 when viewed from the optical axis direction. In addition, the inner side surface 31i is arranged at a position where the second convex portion 72 does not come into contact with the first support portion 30 when the second swing mechanism 120 swings the first support portion 30 about the second swing axis A2. In this embodiment, two second recesses 31g are provided, but only one may be provided. That is, for example, one second concave portion larger than the second concave portion 31g may be provided, and two second convex portions 72 may be accommodated in one second concave portion. In other words, the outline of one second recess may be arranged outside the two second protrusions 72 . However, the thickness of the first support portion 30 in the region where the second concave portion is formed becomes thin. Therefore, providing one large second concave portion may reduce the strength of the first support portion 30 . Therefore, in the present embodiment, two second concave portions 31g are provided in order to secure the thickness of the first support portion 30 in the region other than the movable region of the second convex portion 72. As shown in FIG. In other words, the second recess is formed by dividing it into two. Therefore, it is possible to prevent the thickness of the first support portion 30 from being thinned between the two second recesses 31g. As a result, it is possible to prevent the strength of the first support portion 30 from being lowered.

Further, as shown in FIGS. 3 and 5A, the second protrusion 72 is arranged on the other side Y2 in the second direction Y relative to the first recess 31f. Therefore, it is possible to prevent the second convex portion 72 from contacting the reflecting surface 13 of the optical element 10 . As a result, a space for arranging the optical element 10 can be easily secured. Also, a larger optical element 10 can be mounted. Specifically, a part of the reflecting surface 13 protrudes in one side X1 in the first direction X and one side Y1 in the second direction Y with respect to the lower facing surface 31e. Therefore, it is possible to prevent the optical element 10 from coming into contact with the portion of the first support portion 30 where the second convex portion 72 is arranged. As a result, a space for arranging the optical element 10 can be secured.

As shown in FIGS. 15 and 16 , the support 3 has a second support portion 60 , first projections 71 , second projections 72 and magnetic members 73 . The support 3 preferably has a facing surface 61a and a third receiving recess 61d.

Specifically, the second support portion 60 supports the first support portion 30 so as to be swingable about a second swing axis A2 that intersects with the first swing axis A1. Also, the second support portion 60 supports the first support portion 30 in the first direction X. As shown in FIG.

17 is a view showing the second support portion of the optical unit according to this embodiment from the other side X2 in the first direction X. FIG. As shown in FIGS. 15 to 17 , the second support section 60 has a support body 61 , a pair of side sections 62 and a back section 63 . The support body 61 has a facing surface 61a, a first accommodation recess 61b, at least two second accommodation recesses 61c, and a plurality of third accommodation recesses 61d. In this embodiment, the support body 61 has one first accommodation recess 61b, two second accommodation recesses 61c, and two third accommodation recesses 61d. In this embodiment, an example in which the second support portion 60 has the first accommodation recess 61b and the second accommodation recess 61c will be described. You may have the 1st accommodation recessed part and the 2nd accommodation recessed part which are depressed in the opposite direction to the other. Further, for example, one of the movable body 2 and the support body 3 may have the first accommodation recess, and the other of the movable body 2 and the support body 3 may have the second accommodation recess.

The facing surface 61 a faces the lower facing surface 31 e of the first support portion 30 in the first direction X. As shown in FIG. The first accommodation recess 61b, the second accommodation recess 61c, and the third accommodation recess 61d are arranged on the facing surface 61a. The first accommodation recess 61b, the second accommodation recess 61c, and the third accommodation recess 61d are recessed in the first direction X in the direction opposite to the movable body 2. As shown in FIG. That is, the first accommodation recess 61b, the second accommodation recess 61c, and the third accommodation recess 61d are recessed in the first direction X on one side X1. The first housing recess 61 b faces the first recess 31 f of the first support portion 30 in the first direction X. As shown in FIG. The first housing recesses 61b are arranged on the same circumference C (see FIG. 17) centering on the second swing axis A2. The first accommodation recess 61 b accommodates a portion of the first protrusion 71 . Therefore, the first convex portion 71 is arranged on the second swing axis A2.

Also, the second accommodation recess 61c is separated from the first accommodation recess 61b. Therefore, the second housing recess 61c is separated from the second swing axis A2. Further, in the present embodiment, the second accommodation recess 61c is spaced apart from the first accommodation recess 61b. Also, the second accommodation recess 61 c accommodates a portion of the second protrusion 72 . Therefore, the plurality of second protrusions 72 are arranged on the same circumference C around the second swing axis A2. Therefore, the movable body 2 can be supported at positions equidistant from the first protrusion 71 . As a result, the movable body 2 can be supported more stably. Note that the axial direction of the second swing axis A2 is a direction along the first direction X. As shown in FIG.

In addition, the two second accommodating recesses 61c are arranged side by side in the third direction Z at a position farther from the optical element 10 than the first accommodating recesses 61b.

The first housing recess 61 b holds a portion of the first projection 71 . In this embodiment, the lower half of the first projection 71 is arranged inside the first housing recess 61b. The first convex portion 71 has at least part of a spherical surface. Therefore, since the first protrusion 71 makes point contact with the other of the movable body 2 and the support 3, the frictional force between the first protrusion 71 and the other of the movable body 2 and the support 3 can be made smaller. In this embodiment, since the first convex portion 71 makes point contact with the movable body 2, the frictional force between the first convex portion 71 and the movable body 2 can be made smaller.

Moreover, in this embodiment, the first convex portion 71 is a sphere. Therefore, the friction between the first convex portion 71 and the first concave portion 31f is rolling friction. As a result, it is possible to suppress an increase in the frictional force between the first protrusion 71 and the first recess 31f. Specifically, the first protrusion 71 is rotatable within the first housing recess 61b. Therefore, the friction between the first convex portion 71 and the first concave portion 31f is rolling friction. Note that the first protrusion 71 may be fixed to the first recess 31f using an adhesive, for example.

The second housing recess 61 c holds a portion of the second protrusion 72 . In this embodiment, the lower half of the second protrusion 72 is arranged inside the second accommodation recess 61c. The second convex portion 72 has at least part of a spherical surface. Therefore, since the second protrusion 72 makes point contact with the other of the movable body 2 and the support 3, the frictional force between the second protrusion 72 and the other of the movable body 2 and the support 3 can be reduced. In this embodiment, since the second convex portion 72 makes point contact with the movable body 2, the frictional force between the second convex portion 72 and the movable body 2 can be reduced.

Moreover, in this embodiment, the second convex portion 72 is a sphere. Therefore, since the friction between the second protrusion 72 and the other of the movable body 2 and the support body 3 is rolling friction, the frictional force can be suppressed. In this embodiment, the friction between the second protrusion 72 and the movable body 2 is rolling friction. Specifically, the second protrusion 72 is rotatable within the second housing recess 61c. Therefore, the friction between the second convex portion 72 and the second concave portion 31g of the first support portion 30 is rolling friction. The second convex portion 72 may be fixed to the second concave portion 31g using an adhesive, for example.

Also, as shown in FIGS. 5C and 17, the first receiving recess 61b may have a central recess 611. FIG. The central recessed portion 611 is arranged concentrically with the first accommodating recessed portion 61b. The first protrusion 71 contacts the edge of the central recess 611 . The diameter of the central concave portion 611 is smaller than the diameter of the first convex portion 71 . Therefore, for example, even if there is a gap between the outer peripheral surface of the first protrusion 71 and the inner peripheral surface of the first accommodation recess 61b, the first protrusion 71 can be positioned by the central recess 611. That is, the center of the first convex portion 71 can be arranged on the central axis of the central concave portion 611 . As a result, the center of the first protrusion 71 can be easily arranged on the central axis of the first accommodation recess 61b.

Also, as shown in FIGS. 5D and 17, the second receiving recess 61c may have a central recess 611. FIG. The central recessed portion 611 is arranged concentrically with the second accommodating recessed portion 61c. The second convex portion 72 contacts the edge of the central concave portion 611 . The diameter of the central recess 611 is smaller than the diameter of the second protrusion 72 . Therefore, even if there is a gap between the outer peripheral surface of the second protrusion 72 and the inner peripheral surface of the second housing recess 61c, the second protrusion 72 can be positioned by the center recess 611, for example. That is, the center of the second convex portion 72 can be arranged on the central axis of the central concave portion 611 . As a result, the center of the second protrusion 72 can be easily arranged on the central axis of the second accommodation recess 61c.

Also, the material of the first convex portion 71 and the second convex portion 72 is ceramic. Therefore, it is possible to suppress the wear of the first convex portion 71 and the second convex portion 72 . The material of the first convex portion 71 and the second convex portion 72 may be metal. Also in this case, it is possible to suppress the wear of the first convex portion 71 and the second convex portion 72 . Also, the entire first convex portion 71 and the second convex portion 72 may be made of metal, or only the surfaces of the first convex portion 71 and the second convex portion 72 may be made of metal by plating, for example. may Also, the first convex portion 71 and the second convex portion 72 may be made of resin.

Also, the first convex portion 71 is arranged on one side X1 in the first direction X with respect to the reflecting surface 13 (see FIG. 5A) of the optical element 10 . Therefore, the first convex portion 71 can be arranged without blocking the optical path.

The optical unit 1 has a second preload portion 150 (see FIG. 5D) arranged on at least one of the movable body 2 and the support 3 . The second preload portion 150 applies preload to at least the other of the movable body 2 and the support body 3 in the axial direction of the second swing axis A2. Therefore, it is possible to prevent the movable body 2 from being displaced with respect to the support body 3 in the axial direction of the second swing axis A2. Further, even if there is a manufacturing error in the dimensions of each member, it is possible to suppress the occurrence of looseness or the like in the axial direction of the second swing axis A2. In other words, it is possible to suppress displacement of the movable body 2 in the axial direction of the second swing axis A2.

Also, the second preload section 150 has a magnet arranged on one of the movable body 2 and the support 3 and a magnetic member arranged on the other of the movable body 2 and the support 3 . Therefore, since the magnet and the magnetic member are mutually attracted, a preload can be applied to at least the other of the movable body 2 and the support body 3 in the axial direction of the second swing axis A2 with a simple configuration. In this embodiment, the second preload section 150 has a second magnet 121 arranged on the movable body 2 and a magnetic member 73 arranged on the support 3 .

FIG. 18 is a view showing the second supporting portion 60, the first convex portions 71, the second convex portions 72, and the second magnets 121 of the optical unit 1 according to this embodiment from the other side X2 in the first direction X. FIG. As shown in FIGS. 5D and 18, the third housing recess 61d faces the second magnet 121 of the second swing mechanism 120 in the first direction X. As shown in FIGS. The third accommodation recess 61 d accommodates the magnetic member 73 . The third accommodation recess 61d has a substantially rectangular shape. The magnetic member 73 has a rectangular shape.

The magnetic member 73 is a plate-shaped member made of a magnetic material. The magnetic member 73 is arranged on one side X<b>1 in the first direction X with respect to the second magnet 121 . Since the second magnet 121 and the magnetic member 73 are mutually attracted (hereinafter also referred to as attractive force), it is possible to prevent the movable body 2 from being displaced in the first direction X with respect to the support body 3 . Moreover, since the second magnet 121 of the second swing mechanism 120 is used, it is possible to prevent the number of parts from increasing. In addition to the second magnet 121 of the second swing mechanism 120 , the optical unit 1 may have a magnet for exerting an attractive force with the magnetic member 73 .

In this embodiment, two magnetic members 73 are arranged in each third housing recess 61d. In other words, the magnetic member 73 is spaced apart in the polarized direction of the second magnet 121 of the second swing mechanism 120 . Therefore, the area of the second magnets 121 is smaller than when the second magnets 121 are not separated. In addition, the second magnet 121 is polarized in the second direction Y as shown in FIG. Here, when the movable body 2 is oscillated by the second oscillating mechanism 120 , the attractive force between the second magnet 121 and the magnetic member 73 acts on the movable body 2 in the direction of returning to the reference position. The reference position is a position where the side surface portion 32 of the first support portion 30 and the side surface portion 62 of the second support portion 60 are parallel to each other, as shown in FIG. 5B.

As shown in FIGS. 16 and 18 , the pair of side portions 62 are arranged at both ends of the support body 61 in the third direction Z. As shown in FIGS. The pair of side portions 62 have shapes symmetrical to each other in the third direction Z. As shown in FIG. The side portion 62 has an accommodation hole 62a in which the second coil 125 of the second swing mechanism 120 is arranged. The accommodation hole 62a penetrates the side portion 62 in the thickness direction. That is, the accommodation hole 62a penetrates the side surface portion 62 in the third direction Z. As shown in FIG.

The back portion 63 is arranged at the end portion of the support body 61 on the other side Y2 in the second direction Y. As shown in FIG. The back portion 63 has a housing hole 63a in which the first coil 115 of the first swing mechanism 110 is arranged. The accommodation hole 63a penetrates the back surface portion 63 in the thickness direction. In other words, the accommodation hole 63a penetrates the back surface portion 63 in the second direction Y. As shown in FIG.

An FPC (Flexible Printed Circuit) 80 is arranged to cover the outside of the pair of side portions 62 and the outside of the back portion 63 . The FPC 80 has, for example, semiconductor elements, connection terminals and wiring. The FPC 80 supplies power to the first coil 115 of the first swing mechanism 110 and the second coil 125 of the second swing mechanism 120 at predetermined timings.

Specifically, as shown in FIG. 15, the FPC 80 has a substrate 81, connection terminals 82, reinforcing plates 83, and magnetic members 84. As shown in FIG. The substrate 81 is made of, for example, a polyimide substrate. Substrate 81 has flexibility. The substrate 81 has a plurality of pin insertion holes 81a. The pin insertion hole 81 a faces the first coil 115 . A coil pin (not shown) of the first coil 115 is arranged in each pin insertion hole 81a.

The connection terminals 82 are arranged on the substrate 81 . The connection terminal 82 faces the first swing mechanism 110 and the second swing mechanism 120 . The connection terminal 82 is electrically connected to a terminal of a Hall element (not shown). For example, four connection terminals 82 are arranged for one Hall element. Three reinforcing plates 83 are arranged on the substrate 81 . The reinforcing plate 83 faces the first swing mechanism 110 and the second swing mechanism 120 . The reinforcing plate 83 suppresses the bending of the substrate 81 .

Three magnetic members 84 are arranged on the substrate 81 . The two magnetic members 84 face the second magnet 121 of the second swing mechanism 120 . An attractive force is generated between the second magnet 121 and the magnetic member 84 when the second coil 125 is not energized. Therefore, the movable body 2 is arranged at the reference position in the rotation direction about the second swing axis A2. Also, the remaining one magnetic member 84 faces the first magnet 111 of the first swing mechanism 110 . An attractive force is generated between the first magnet 111 and the magnetic member 84 when the first coil 115 is not energized. Therefore, the movable body 2 is arranged at the reference position in the rotation direction about the first swing axis A1. In addition, it is possible to prevent the holder 20 from slipping out of the first magnet 111 and the magnetic member 84 to the one side Y1 in the second direction Y due to the attractive force.

As shown in FIGS. 5A and 5B, the optical unit 1 further has a first swing mechanism 110. As shown in FIGS. The first swing mechanism 110 swings the holder 20 with respect to the first support portion 30 about the first swing axis A1. Therefore, the optical element 10 can be easily oscillated around each of the two oscillating axes (the first oscillating axis A1 and the second oscillating axis A2). The first swing mechanism 110 has a first magnet 111 and a first coil 115 . The first coil 115 faces the first magnet 111 in the second direction Y. As shown in FIG.

The first magnet 111 is arranged on one of the holder 20 and the second support portion 60 . On the other hand, the first coil 115 is arranged on the other of the holder 20 and the second support portion 60 . Therefore, force acts on the first magnet 111 due to the magnetic field generated when the first coil 115 is energized. The holder 20 then swings with respect to the first support portion 30 . Therefore, the holder 20 can be oscillated with a simple configuration using the first magnet 111 and the first coil 115 . In this embodiment, the first magnet 111 is arranged on the holder 20 . The first coil 115 is arranged on the second support portion 60 . By arranging the first coil 115 on the second support portion 60 , the first coil 115 does not swing with respect to the second support portion 60 . Therefore, compared to the case where the first coil 115 is arranged on the first support portion 30, for example, wiring to the first coil 115 can be facilitated.

Specifically, the first magnet 111 is arranged on the back surface 21 b of the holder 20 . That is, the first magnet 111 is arranged at the end portion 20a of the holder 20 on the other side Y2 in the second direction Y. As shown in FIG. The first magnet 111 has an n-pole portion 111a having an n-pole and an s-pole portion 111b having an s-pole. The first magnet 111 is polarized in the first X direction.

The first coil 115 is arranged in the accommodation hole 63 a of the back surface portion 63 of the second support portion 60 . That is, the first coil 115 is arranged at the end portion 60a of the second support portion 60 on the other side Y2 in the second direction Y. As shown in FIG. Therefore, it is possible to prevent the first coil 115 and the first magnet 111 from being placed on the optical path. Therefore, blocking of the optical path by the first coil 115 and the first magnet 111 can be suppressed.

A magnetic field is generated around the first coil 115 by energizing the first coil 115 . A force resulting from the magnetic field acts on the first magnet 111 . As a result, the holder 20 and the optical element 10 swing with respect to the first support section 30 and the second support section 60 about the first swing axis A1.

The second swing mechanism 120 swings the movable body 2 around the second swing axis A2. Specifically, the second swing mechanism 120 swings the first support portion 30 with respect to the second support portion 60 about the second swing axis A2. The second swing mechanism 120 has a second magnet 121 and a second coil 125 facing the second magnet 121 . The second magnet 121 is arranged on one of the first support portion 30 and the second support portion 60 . On the other hand, the second coil 125 is arranged on the other of the first support portion 30 and the second support portion 60 . Therefore, the first support section 30 swings with respect to the second support section 60 due to the magnetic field generated when the second coil 125 is energized. Therefore, the first support section 30 can be swung with a simple configuration using the second magnet 121 and the second coil 125 . In this embodiment, the second magnet 121 is arranged on the first support portion 30 . The second coil 125 is arranged on the second support portion 60 . By arranging the second coil 125 on the second support portion 60 , the second coil 125 does not swing with respect to the second support portion 60 . Therefore, compared to the case where the second coil 125 is arranged on the first support portion 30, for example, wiring to the second coil 125 can be facilitated.

Specifically, the second magnet 121 is arranged in the housing recess 32f (see FIG. 12) of the side portion 32 of the first support portion 30. As shown in FIG. That is, the second magnet 121 is arranged at the end portion 30a of the first support portion 30 in the direction intersecting the first direction X. As shown in FIG. In this embodiment, the second magnet 121 is arranged at the end 30a in the third direction Z. As shown in FIG. The second magnet 121 has an n-pole portion 121a having an n-pole and an s-pole portion 121b having an s-pole. The second magnet 121 is polarized in a second direction Y that intersects with the first direction X. As shown in FIG. Therefore, the movable body 2 can be swung about the second swing axis A2 along the incident direction of light.

The second coil 125 faces the second magnet 121 in the third direction Z. As shown in FIG. The second coil 125 is arranged in the receiving hole 62a (see FIG. 16) of the side portion 62 of the second support portion 60. As shown in FIG. That is, the second coil 125 is arranged at the end portion 60b of the second support portion 60 in the third direction Z. As shown in FIG.

A magnetic field is generated around the second coil 125 by energizing the second coil 125 . A force resulting from the magnetic field acts on the second magnet 121 . As a result, the first support section 30, the holder 20 and the optical element 10 swing with respect to the second support section 60 about the second swing axis A2.

Note that when optical unit 1 is used in smartphone 200 as shown in FIG. 1 , a Hall element (not shown) in smartphone 200 detects the orientation of smartphone 200 . The first rocking mechanism 110 and the second rocking mechanism 120 are controlled according to the attitude of the smartphone 200 . Also, the optical unit 1 is preferably capable of detecting the orientation of the holder 20 with respect to the second support section 60 . In this case, the posture of the holder 20 with respect to the second support portion 60 can be controlled with high accuracy. A gyro sensor, for example, may be used as a sensor that detects the orientation of smartphone 200 .

Hereinafter, the first to sixth modifications of the present embodiment will be described with reference to FIGS. 19 to 25. FIG. Differences from the present embodiment shown in FIGS. 1 to 18 will be mainly described below.

(First modification)
A first modification of the embodiment of the present invention will be described with reference to FIG. FIG. 19 is a diagram showing the structure of the holder 20 of the optical unit 1 according to the first modified example of the present embodiment viewed from the fourth direction α. In the first modified example, unlike the embodiment shown in FIGS. 1 to 18, an example in which the depth of the groove portion 211 of the holder body 21 becomes deeper as it approaches the inner side surface 221 will be described.

As shown in FIG. 19 , the depth of groove 211 increases as it approaches inner side surface 221 . Therefore, the position of the groove 211 corresponding to the portion of the mold that is most likely to be eroded can be made deeper than the other positions. Therefore, it is possible to effectively prevent the unnecessary portion P21 from protruding toward the optical element 10 from the support surface 21a.

In addition, in the first modification, the groove portion 211 includes a portion of the inner side surface 221 and a flat portion extending in a direction inclined with respect to the first direction X from the end portion of the inner side surface 221 on one side X1 in the first direction X. and the inclined surface 211e. Therefore, unlike the case where the groove portion 211 is composed of, for example, a part of the inner side surface 221 and a curved surface, it is not necessary to form a curved surface on the mold, so that it is possible to reduce the time required to manufacture the mold.

Other structures and effects of the first modified example are the same as those of the embodiment shown in FIGS.

(Second modification)
A second modification of the embodiment of the present invention will be described with reference to FIG. FIG. 20 is a diagram showing the structure of the holder 20 of the optical unit 1 according to the second modified example of the present embodiment viewed from the fourth direction α. As shown in FIG. 20, in the second modification, the groove portion 211 is formed by a portion of the inner side surface 221 and a curved surface 211f extending from the end of the inner side surface 221 on the one side X1 in the first direction X to the support surface 21a. Configured. The curved surface 211f is a curved surface that is convex toward the other side X2 in the first direction X. As shown in FIG.

(Third modification)
A third modification of the embodiment of the present invention will be described with reference to FIG. FIG. 21 is a diagram showing the structure of the holder 20 of the optical unit 1 according to the third modified example of the present embodiment viewed from the fourth direction α. As shown in FIG. 21, in the third modification, the groove 211 has a curved bottom surface 211g. The bottom surface 211g is a curved surface that protrudes toward the one side X1 in the first direction X. As shown in FIG. Therefore, since the portion of the mold corresponding to the groove portion 211 can be curved, it is possible to suppress erosion of the mold.

(Fourth modification)
A fourth modification of the embodiment of the present invention will be described with reference to FIGS. 22 and 23. FIG. FIG. 22 is a diagram showing the structure of the optical element 10 and the holder 20 of the optical unit 1 according to the fourth modified example of this embodiment, viewed from the fourth direction α. FIG. 23 is a perspective view showing the structure of the optical element 10 of the optical unit 1 according to the fourth modified example of this embodiment. In the fourth modification, unlike the embodiment shown in FIGS. 1 to 18 and the first to third modifications, an example in which the optical element 10 has a chamfered portion 15 will be described.

As shown in FIGS. 22 and 23, the optical element 10 has a reflective surface 13, side surfaces 14 and chamfers 15. As shown in FIGS. The chamfered portion 15 is arranged at the connecting portion of the reflecting surface 13 and the side surface 14 . Therefore, even if the corners of the mold for molding the holder are eroded and the unnecessary portion P21 is formed at the connecting portion between the support surface 21a and the inner side surface 221 of the holder 20, the unnecessary portion P21 is not an optical element. 10 can be suppressed. Therefore, it is possible to suppress deterioration in mounting accuracy of the optical element 10 with respect to the holder 20 . In the fourth modification, the chamfered portions 15 are arranged at both ends of the optical element 10 in the third direction Z. FIG. The concave portion 21d of the holder main body 21 is arranged between the chamfered portions 15 in the third direction Z. As shown in FIG.

In the fourth modification, the depth H15 of the chamfered portion 15 with respect to the reflecting surface 13 is the deepest at the position closest to the side surface 14 . Therefore, of the chamfered portion 15, the position corresponding to the portion of the mold that is most likely to be eroded can be made the deepest. Therefore, even if the corners of the mold are melted, the unwanted portion P21 can be prevented from coming into contact with the optical element 10 .

Also, the depth H15 of the chamfered portion 15 becomes deeper as the side surface 14 is approached. Therefore, of the chamfered portion 15, the position corresponding to the portion of the mold that is most susceptible to erosion, etc., can be made deeper than the other positions. Therefore, contact of the unnecessary portion P21 with the optical element 10 can be effectively suppressed.

Further, the chamfered portion 15 is configured by a flat inclined surface 15 a that is inclined with respect to the first direction X and connects the side surface 14 and the reflective surface 13 . Therefore, unlike the case where the chamfered portion 15 is constituted by a curved surface connecting the side surface 14 and the reflecting surface 13, it is not necessary to form a curved surface on the mold, so that it is possible to suppress the time required for manufacturing the mold.

Also, the angle θ1 formed between the inclined surface 15a and the reflecting surface 13 is greater than or equal to the angle θ2 formed between the inclined surface 15a and the side surface 14 . Therefore, it is possible to prevent the reflective surface 13 from being narrowed by the chamfered portion 15 . In other words, it is possible to suppress narrowing of the reflecting surface 13 of the optical element 10 . In addition, in the fourth modification, the angle θ1 formed between the inclined surface 15a and the reflecting surface 13 is the same as the angle θ1 formed between the inclined surface 15a and the side surface 14 (45 degrees).

Further, the chamfered portion 15 extends from one end 13a of the reflecting surface 13 in the fourth direction α to the other end 13b. Therefore, the unnecessary portion P21 contacts the optical element 10 regardless of the position of the unnecessary portion P21 formed in the fourth direction α at the connecting portion between the supporting surface 21a and the inner side surface 221 of the holder 20. can be suppressed.

(Fifth modification)
A fifth modification of the embodiment of the present invention will be described with reference to FIG. FIG. 24 is a diagram showing the structure of the optical element 10 and the holder 20 of the optical unit 1 according to the fifth modified example of this embodiment, viewed from the fourth direction α. As shown in FIG. 24 , in the fifth modified example, the chamfered portion 15 is configured by a curved surface 15 b connecting the reflecting surface 13 and the side surface 14 .

(Sixth modification)
A sixth modification of the embodiment of the present invention will be described with reference to FIG. FIG. 25 is a diagram showing the structure of the optical element 10 and the holder 20 of the optical unit 1 according to the sixth modified example of this embodiment, viewed from the fourth direction α. In the sixth modification, unlike the embodiment and the first to fifth modifications shown in FIGS. 1 to 18, an example in which the holder body 21 has spacers 212 will be described.

As shown in FIG. 25, the holder body 21 has spacers 212 . A spacer 212 is arranged on the support surface 21a. Also, the spacer 212 separates the optical element 10 from the support surface 21a. Therefore, when the second adhesive member 55 is arranged between the side surface portion 22 of the holder 20 and the optical element 10, the second adhesive member 55 before hardening is on the support surface 21a side (one side X1 in the first direction X). Even if the second adhesive member 55 flows on the reflective surface 13 of the optical element 10, the second adhesive member 55 can be prevented from flowing.

The spacer 212 and the holder main body 21 may be a single member or separate members. When the spacer 212 and the holder main body 21 are made of a single member, the spacer 212 can be formed when the holder 20 is molded.

The embodiments (including modifications) of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above-described embodiments, and can be implemented in various aspects without departing from the gist of the present invention. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be omitted from all components shown in the embodiments. For example, components across different embodiments may be combined as appropriate. In order to make the drawings easier to understand, the drawings mainly show each component schematically. may be different. In addition, the material, shape, dimensions, etc. of each component shown in the above embodiment are examples and are not particularly limited, and various changes are possible without substantially departing from the effects of the present invention. be.

For example, in the above-described embodiment and modified example, an example in which the groove portion 211 or the chamfered portion 15 is arranged on both sides in the third direction Z has been described, but the present invention is not limited to this. The groove portion 211 or the chamfered portion 15 may be arranged only in one of the third directions Z. As shown in FIG. For example, when the holder 20 has the holder main body 21 and one side surface portion 22, the groove portions 211 do not have to be arranged on both sides in the third direction Z.

Further, for example, in the above-described fourth and fifth modifications, in the case where the optical element 10 has the chamfered portion 15, the chamfered portion 15 is configured by the inclined surface 15a or the curved surface 15b. is not limited to this. The chamfered portion 15 may be formed in a stepped shape, for example, like the groove portion 211 of the embodiment shown in FIGS. 1 to 18 .

Also, in the above-described embodiment, the optical unit 1 has the first support section 30, the second support section 60, the first swing mechanism 110, the second swing mechanism 120, etc., but the present invention is not limited to this. is not limited to The optical unit of the present invention does not have to have the first support, the second support, the first swing mechanism, the second swing mechanism, and the like.

The present invention can be used, for example, in optical units.

Reference Signs List 1: optical unit 10: optical element 13: reflecting surface (mounting surface)
14: side surface 15: chamfered portion 15a: inclined surface 20: holder 21: holder main body 21a: support surface (mounting surface)
21d: concave portion 21e: one end 21f: other end 22: side surface portion 55: second adhesive member (adhesive member)
211: groove 211b: end 211e: inclined surface 212: spacer 221: inner surface H15: depth H211: depth L: light X: first direction X1: one side Y: second direction Y1: one side Y2: the other Side Z: third direction α: fourth direction θ1, θ2: angle

Claims (14)

an optical element that reflects light traveling in one side of a first direction to one side of a second direction that intersects with the first direction;
a holder for holding the optical element,
The holder is
a holder body extending in a third direction intersecting the first direction and the second direction;
a side portion extending from the holder body in a cross direction crossing the third direction,
The holder body has a mounting surface on which the optical element is mounted,
the side portion has an inner side facing the optical element;
the inner surface is connected to an end of the mounting surface in the third direction;
The holder body has a groove portion arranged at the end portion of the mounting surface,
or
The optical element has a mounting surface to be mounted on the mounting surface, a side surface facing the inner surface, and a chamfered portion arranged at a connection portion between the mounting surface and the side surface. optical unit. 2. The optical unit according to claim 1, wherein said holder body has said groove. 3. The optical unit according to claim 2, wherein the depth of said groove is the deepest at a position closest to said inner surface. 4. The optical unit according to claim 3, wherein the depth of said groove portion becomes deeper as it approaches said inner side surface. The groove portion is configured by a part of the inner surface and a flat inclined surface extending from one end of the inner surface in the first direction in a direction inclined with respect to the first direction. Item 5. The optical unit according to item 4. the mounting surface is connected to the inner surface along a fourth direction that intersects with the third direction;
The optical unit according to any one of claims 2 to 5, wherein the groove portion extends from one end of the mounting surface to the other end in the fourth direction. When viewed from the first direction, the end of the groove on one side in the second direction is located on the other side in the second direction compared to the end of the mounting surface on one side in the second direction. 7. An optical unit according to any one of claims 2 to 6, located. The optical element has the mounting surface, the side surface, and the chamfered portion,
2. The optical unit according to claim 1, wherein the depth of said chamfered portion with respect to said mounting surface is the deepest at a position closest to said side surface. 9. The optical unit according to claim 8, wherein the depth of said chamfered portion becomes deeper as it approaches said side surface. 10. The optical unit according to claim 9, wherein the chamfered portion is configured by a flat inclined surface that is inclined with respect to the first direction and connects the side surface and the mounting surface. 11. The optical unit according to claim 10, wherein an angle formed between said inclined surface and said mounting surface is greater than or equal to an angle formed between said inclined surface and said side surface. The grooves are arranged at both ends of the mounting surface in the third direction,
or
The chamfered portions are arranged on both sides of the optical element in the third direction,
The holder body has a concave portion arranged on the mounting surface,
12. The optical unit according to any one of claims 1 to 11, wherein the recess is arranged between the grooves or between the chamfers in the third direction. further comprising an adhesive member disposed between the side surface portion of the holder and the optical element;
13. The optical unit according to any one of claims 1 to 12, wherein the bonding member bonds the holder and the optical element. 14. The optical unit according to claim 13, wherein said holder body has a spacer disposed on said mounting surface and separating said optical element from said mounting surface.

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